![]() Outliers are extreme values that differ from most values in the data set. The mean tells us that in our sample, participants spent an average of 50 USD on their restaurant bill. In the formula, n is the number of values in your data set. Step 2: Divide the sum by the number of values Step 1: Find the sum of the values by adding them all upīecause we’re working with a sample, we use the sample formula. You ask a sample of 8 neighbors how much they spent the last time they went out for dinner, and find the mean cost. Let’s say you want to find the average amount people spend on a restaurant meal in your neighborhood. ![]() We’ll walk through these steps with a sample data set.
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